Accumulated Other Comprehensive Income Level 3 (Tables)

12 Months Ended

Dec. 31, 2020

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Changes in AOCI, Net of Tax for the Year Ended December 31, 2020 (Successor Company)
	Changes in
	Net Unrealized Gain on Fixed Maturities		Unrealized Losses on Fixed Maturities for Which an ACL Has Been Recorded		Net Gain on Cash Flow Hedging Instruments		Foreign Currency Translation Adjustments		AOCI, net of tax
Beginning balance	$	717	$	—	$	—	$	—	$	717
OCI before reclassifications	665		(1)		(1)		—		663
Amounts reclassified from AOCI	(100)		1		—		—		(99)
OCI, net of tax	565		—		(1)		—		564
Ending balance	$	1,282	$	—	$	(1)	$	—	$	1,281

Changes in AOCI, Net of Tax for the Year Ended December 31, 2019 (Successor Company)
	Changes in
	Net Unrealized Gain on Fixed Maturities		Net Gain on Cash Flow Hedging Instruments		Foreign Currency Translation Adjustments		AOCI, net of tax
Beginning balance	$	(173)	$	—	$	2	$	(171)
OCI before reclassifications	927		—		(2)		925
Amounts reclassified from AOCI	(37)		—		—		(37)
OCI, net of tax	890		—		(2)		888
Ending balance	$	717	$	—	$	—	$	717

Changes in AOCI, Net of Tax for the Period of June 1, 2018 to December 31, 2018 (Successor Company)
	Changes in
	Net Unrealized Gain on Fixed Maturities		Net Gain on Cash Flow Hedging Instruments		Foreign Currency Translation Adjustments		AOCI, net of tax
Beginning balance	$	—	$	—	$	—	$	—
OCI before reclassifications	(198)		—		2		(196)
Amounts reclassified from AOCI	25		—		—		25
OCI, net of tax	(173)		—		2		(171)
Ending balance	$	(173)	$	—	$	2	$	(171)

Changes in AOCI, Net of Tax for the Period of January 1, 2018 to May 31, 2018 (Predecessor Company)
	Changes in
	Net Unrealized Gain on Fixed Maturities		Net Gain on Cash Flow Hedging Instruments		Foreign Currency Translation Adjustments		AOCI, net of tax
Beginning balance	$	1,022	$	4	$	(3)	$	1,023
Cumulative effect of accounting changes, net of tax [1]	182		—		—		182
Adjusted balance, beginning of period	1,204		4		(3)		1,205
OCI before reclassifications	(432)		(13)		1		(444)
Amounts reclassified from AOCI	2		(5)		—		(3)
OCI, net of tax	(430)		(18)		1		(447)
Ending balance	$	774	$	(14)	$	(2)	$	758

[1]    Includes reclassification to retained earnings of $193 of stranded tax effects and $11 of net unrealized gains, after tax, related to equity securities. Refer to Note 1 - Basis of Presentation and Significant Accounting Policies for further information.

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

Reclassification from AOCI
	Successor Company						Predecessor Company
	For the Years Ended December 31,				June 1, 2018 to December 31, 2018		January 1, 2018 to May 31, 2018		Affected Line Item on the Consolidated Statement of Operations
	2020		2019
Net Unrealized Gain on Fixed Maturities
Available-for-sale securities	$	127	$	47	$	(32)	$	(2)	Net realized capital gains (losses)
	127		47		(32)		(2)		Income before income taxes
	27		10		(7)		—		Income tax expense
	$	100	$	37	$	(25)	$	(2)	Net income
Unrealized Losses on Fixed Maturities for Which an ACL Has Been Recorded
Fixed maturities, AFS	$	(1)							Net realized capital gains (losses)
	(1)								Income before income taxes
	—								Income tax expense
	$	(1)							Net income
Net Gains on Cash-Flow Hedging Instruments
Interest rate swaps	$	—	$	—	$	—	$	—	Net realized capital gains (losses)
Interest rate swaps	—		—		—		8		Net investment income
Foreign currency swaps	—		—		—		(2)		Net realized capital gains (losses)
	—		—		—		6		Income before income taxes
	—		—		—		1		Income tax expense
	$	—	$	—	$	—	$	5	Net income
Total amounts reclassified from AOCI	$	99	$	37	$	(25)	$	3	Net income